Lock



oct. 2o, 1925. l y 1,558,170

, N. B. HURD Lock Filed Sept. 5, 1924 v INVENTO ATTORY Patented Oct. 20, 1925.

UNITED STATES PATENT OFFICE.

NORMAN B. HURI), OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE AMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, .A CORPORATION 0F CONNECTICUT.

LOCK.

Application led September 5, 1924.

To all whom t may concern.'

Be it known that I, NORMAN B. HURD, a citizen of the United States of America, residing at New Britain, Connecticut, have invented. a new and useful Lock, of which the following is a specification.

My invention relates to a lock, particularly, though not exclusively, adapted vtor use on automobile. doors and the like.

It is an object of the invention to provide lock of serviceable and rugged construction wherein the locking bolt is moved in one direction by key-controlled means, and which may be moved in the opposite direction by a spring.

Other objects will be apparent as the specification proceeds.

In the accompanying drawings, which show lor illustrative purposes only, a pret'erred form of the invention,

Fig. 1 is a iront side vie-w ol my improved. lock applied to a door member;

Fig. 2 is a rear side view of the lock;

F ig. 3 is a rear edge view of the lock, and

Fig. l is a bottom edge view taken at right angles to Fig. 3.

The lock may be applied to either the door or jan'ib and, in the illustrative form shown, is secured to the door diagrammatically shown at 5. 6 indicates diagrammatically the usual door j amb. The improved form of look has a frame or lock casing 7, provided with a front upstanding flange or face member 8. The ilange S may be provided with apertures as at 9---9 for the reception of screws or the like, for securing the lock frame in place.

The rear end of the frame 7 is enlarged so as to provide a boss 10 which is bored to receive the cylinder 11 of any suitable type ot' cylinder lock. A cylinder plug 12 lits in the cylinder 11 and the usual pin tumblers are provided in the cylinder and plug. The rear end of the plug has a rollback 13 thereon. The cylinder may be held in place in the boss 10 by any suitable means, such as a screw 14, which passes through the wall of the boss 10 and engages the cylinder ltor positioning the same.

Serial No. 736,037.

The 'front flange S is apertured to permit the passage of a locking bolt 15 which, in the forni shown, is of substantially cylindrical shape and has a rounded forward end. In the rear of the flange 8 the trame has a lug 16, which is also provided with a passageway for the locking bolt- 15, which bolt is thus guided and positioned by means oit the passages in the flange 8 and lug 16. The rear end ol2 the locking bolt 15 may be provided with means such as a llange or head 17, to be engaged by the rollback 13, so as to permit actuation of the locking bolt by the key-controlled plug 12.

In the present disclosure, the key-con trolled plug and rollback serve to move the locking bolt to the locked position, as indicated in F ig. 1. The locking bolt is retracted by a spring, which, in the form shown, is a coil spring 18 surrounding the locking bolt and engaging the rear of the front flange 8, and engaging a suitable abutment, such as a cotter pin 19, on the locking bolt.

It will be plain that when the key is inserted in the lock so as to release the tumblers and the key is then released, the retracting spring 18 will withdraw the locking bolt 15 from the keeper 2O on the door j amb. In order to remove the key it will be necessary to rotate the plug so as to position the rollback 13 behind the head 17 as shown in Fig. 2 and the bolt 15 will then be held in the unlocked position. lVhen the bolt is in locked position (Fig. 1) and the key is withdrawn from the cylinder lock plug by a longitudinal movement, the pin tumblers therein will be shifted to hold the plug against rotation and thereby hold the bolt in locked position. Then it is desired to retract the bolt the key is inserted into the plug and rotated suliieiently to release the binding strain on the tumblers occasioned by the spring 1S, whereupon said tumblers will move to release the plug, thereby permitting it to turn so that the locking bolt will be retracted.

lhile I have described one embodiment of the invention in some detail, I wish it l understood that the drawings arc but illustlative and that changes may be made Within the scope of the invention as defined in the appended claim.

I claim:

In a lock, :i look lil-aine, u looking bolt mounted for movement tliereolnu key opel'- ated cylinder lock on said frame, :1 Pollbacl; on the plug of said eylindei lock and adapted to project said looking bolt into locking position, a spring for moving said lookingbolt in an unlocking direction, and ineuns operated by u longitudinal inoven'ien't of the lock key to liold the bolt in locking` position.

NORMAN B. HURD. 

